Stereopticon device



Apr. 24, 1923.

W. H. C. DUDLEY STEREOPTICON DEVICE Filed July 26 1921 latented Apr.'24, 1923.

UNITED STATES PATENT OFFICE.

"WILLIAM H. C. DUDLEY, 0F AIERICS, GEORGIA.

. STEREOPTICON DEVICE.

Application med July 26,

T 0 all whom it may concern.:

Be it known that I, WILLIAM H. C. DUD- LEY, a citizen of the United States, and a resident of Americus, in the county of Sumter, and State of Georgia, have invented certain new and useful Improvements in Stereopticon Devices, of which the followin@r is a specification.

1y invention relates generally to'picture projecting machines and more partlcularly to the projection of stereopticon pictures for printed matter for advertlsing purposes.

The purpose of my invention 1s the provision of a simple and inexpensive stereopticon device designed for attachment to the lamp housing of a motion picture projecting apparatus, and by means of which advertising matter can be successively p rojected and displayed, the invention consisting in the main of a transparent strlp of film upon which the advertising matter is printed or attached thereto, and which is mountedfor movement along its length and so supported and associated -with respect to the lamp housing as to allow of the advertising matter being vertically displayed and in succession as the film is moved.

I will describe `one form of stereopticon device embodying my invention and one form of lamp housing and attaching means for the device, and will then point outl the novel features thereof in claims.

In the accompanying drawings:

Figure 1 is a view showing in perspective a standard form of lamp housing having applied thereto one form of stereopticon de vice embodying my invention.

Figure 2 is a vertical longitudinal sectional view of a portion of the lamp housing and the entire stereopticon device shown in Figure 1.

Figure 3 is a detailed perspective view of the film and supporting spools therefor embodied in the device shown in the preceding views.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically to the drawings, my invention in its present embodiment comprises a casing K which is relatively nar row and provided with rounded ends. The opposite sides of the casing K are formed with light openings 15 and 15a. As shown in Figure 2, the casing K contains spools S and S similar in construction to the usual camera spools for holding films. These 1921. Serial No. 487,735.

spools are arranged in the rounded ends 0fl the casing and are retained in these positions by means of a frame designated at E which is of rectangular formation and of such an area as to fit within the opening at the forward side of the casing K. This frame E carries rollers 16 and 16, the latter of which cooperates with a third roller 17 mounted within the casing, and all of the rollers serve to provide a roller bearing surface for insuring the unrestricted feeding of a film thereover. The film is designated at F and as shown in Figures 2 and 3, is trained about the spools S and S with the intermediate portion of the film spanning the light opening 15 of the casing K. The lower spool S is adapted to be manually actuated through the medium of a key 18 rotatably fitted within one wall of the casing and having a winged head fitted in one of a pair of slots 19 formed in the opposite ends of the spool. Both spools S and S are of the same construction and they are provided with the slots 19 and intermediate slots 20 which, as shown in Figure 2, are adapted to receive the ends of the film to temporarily secure the same upon the spools.

The frame E is removably fitted within the casing K to allow the application and removal of the film and spools to and from the casing, and in the applied position of the frame it is adapted to be latched therein The stereopticon device as a unit is adapted to be supported so that its light openings register with the lens opening 21 of a lamp housing B., by means of a bracket T, such bracket in the present instance comprising a clip 22 formed of resilient metal and of substantially U-shaped contour to clampingly receive the lower end of the casing as clearly shown in Figures 1 and 2. The clip 22 is of a length corresponding to the width of the casing K so that the entire casing will be securely held in proper position with respect to the lens opening. The clip 22 is supported for horizontal adjustment on an extension 23 secured to the clip and slidably fitted within a sleeve 24 formed on a casting 25 secured to aplate 26 with the latter riveted or otherwise fixed to the lamp housing B. The extension is secured in any adjusted position by a set screw .27.

In the applied position of the stereopticon device to the lamp housing as shown in Figures 1 and 2, the light openings of the casing and frame are in registration with the lens 'opening 2l in which the condensing lenses N are arranged. The rays from the source of light within the lamp housing are projected through the lenses N and through the light openings of the stereopticon device ultimately passing from the hood H all as indicated by the arrows in Figure 2. During the passage of the light rays through the device they traverse the film thereby effecting the projection upon a screen ot any matter contained on the film. This film 1n the present instance is formed of transparent material such as celluloid or the like, and has imprinted thereon indicia for advertising purposes or pictures so formed as to allow the transmission of light therethrough in effecting their projection upon a screen. It will thus be seen that by manually rotating the lower spool S in the direction of the arrow, a downward feeding of the film is effected across the lens opening so thatthe matter contained upon the film can be successively projected onto the screen.

The stereopticon device is designed primarily for exhibiting advertising matter such as printed matter giving information re arding subsequent motion pictures to be ex ibited, or stereopticon views of the actors or actresses to appear in the film.V When constructing the film of celluloid it is possible to insert the film in a typewriter and to type any matter thereon. This typewritten matter can be readily erased from the film without destroying the transparency of the film. It will therefore be manifest that an printed matter can be applied to the film and after once exhibited can be removed and new matter applied so that a single filmcan be used indefinitely.

In practice, the matter to be exhibited is applied or attached to the film F and the film with the spools placed in the casing Ky in the manner shown in Figure 2. The device is now applied to the lamp housing by Luana? inserting the lower end of the casing into the clip 22' so that the device is securely supported with its light openings in re istration with thelens opening 21. The bu k of the film is trained about the upper spoolS with its lower end secured to the spool S so that by rotating the latter the film is fed downwardly across the lens opening. The arrangement of matter upon the film is such that it will be vertically and successively displayed as the film is moved downwardly, and with printed matter on the film, it will be clear that the matter can be successively projected upon the screen so that the audience can continuously read the matter as it is successively displayed.

Although I have herein shown and described only one form of stereopticon device embodying my invention, it is to be understood that various chan es and modifications may be made herein wit out departing from the spirit of the invention or the spirit and scope of' the appended claims.

What I claim is:

l. A stereopticon device comprising a casing having light openings formed therein, a fiexible transparent film supported within the casing for movement across the light openings, and a bracket adapted to support the casing so that the light openings register with the lens opening of the lamp housing, said bracket comprising a clip adapted to receive one end of the casing, and means for adjustably supporting the clip.

2. A stereopticon device comprising a casing having light openings formed therein, a flexible transparent film supported Within y the casing for movement across the light openings, a bracket adapted to support the casing so that the light openings register with the lens opening of the lamp housing, said bracket comprising a clip adapted t0 receive one end of the casing, means to adjustably support the clip, and a hood ar ranged in advance of the casing and connected thereto.

WILLIAM H. C. DUDLEY. 

